复杂环境中石方的爆破控制

株洲二线船闸基坑石方爆破量达91. 5万m3,东西两侧分别为运营的一线船闸和京广铁路,附近分布有大量的民房,跨一线船闸桥桥墩位于爆破范围内。针对石方爆破场地周边建筑众多、地下水丰富、断层发育的问题,进行石方爆破控制技术的研究。采用沟槽爆破、打密集孔、缓冲孔、PVC套管等技术,一线船闸、京广铁路均安全运行,跨一线船闸桥墩、附近民房得到了有效保护。本工程实施的船闸基坑石方爆破控制技术,可为类似工程提供参考。

Rock blasting control in complex environment

The stone blasting quantities in the foundation pit of Zhuzhou second ship lock are 915 thousand m3.The first-line ship lock and Beijing to Guangzhou Railway are respectively operated on the east and west sides.A large number of houses are distributed nearby,and the bridge piers across the first ship lock are located in the blasting range.In view of the problems of many buildings around the stone blasting site,abundant groundwater and development of faults,we research the control technology of rock blasting.By using trench blasting,drilling dense holes,buffer holes,PVC casing and other technologies,the first lock and the Beijing to Guangzhou Railway all operate safely,and the piers of the first lock and nearby houses are effectively protected.The rock blasting control technology of this project can provide certain reference for the similar expansion lock rock blasting construction.